Pipe-bending device.



R. BURGE.

PIPE BENDING DEVICE. APPLICATION FILED OCT. 18, 1915.

1 ,1 8&7269 Patented June 27, 1916.

WEED STA E S FATENT @FFTQE.

ROBERT BURGE, 0F ATLANTA, GEORGIA, ASSIGNOR OF ONE-HALF T0 ATLANTA STOVE WORKS, A CORPORATION OF GEORGIA.

PIPE-BENDING DEVICE.

Specification of Letters Patent.

Patented June 2?, 1916.

Application filed October 18, 1915. Serial No. 56,558.

To all whom it may concern Be it known that 1, ROBERT BURGE, a citizen of the United States, residiu g at Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful Improvements in Pipe-Bending Devices; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to a device for coiling metal pipe for forming a heating coil to be used in a stove or heater for furnishing hot water.

It has for its object to provide such a de vice which will be simple in construction and efficient for the purpose, and will enable the heating coil to be expeditiously formed and of the proper configuration to fit within the combustion chamber or fire pot of the heater.

To the accomplishment of the foregoing and such other objects as may hereinafter appear the invention consists in the features hereinafter described and then sought to be clearly defined by the claims, reference being had to the accompanying drawing farming a part hereof, and in which- Figure 1 is a side view of the device with its parts assembled, and showing in dotted lines the coil as formed by it; Fig. 2 is an end view of the device, looking at the interior thereof; Fig. 3 is a longitudinal section through the device; Fig. 4 a face view looking at the inside of the retaining cap; Fig. 5 an end view looking at the face of the mandrel, with the retaining cap omitted; Fig. 6 a section on the line 6-6 of Fig. 5, and showing the mandrel attached to a shaft for rotating the mandrel.

In the drawing the numeral 1 designates a mandrel having a tapering or cone shaped exterior and formed with a recessed head portion 2 formed with an interior shoulder 3 adapted to form a seat for a head 41 of a shaft 5 forming a part of a suitable power means for rotating the mandrel. The mandrel is formed with a central web 6 having a series of openings 7 to receive pins 8 projecting from the head 4; by means of which and nuts 9 threaded on the pins the ma drel is secured to the head so as to rotate therewith. The other end of the mandrel 1s recessed and formed with lugs 10 adapted to fit in slots 11 formed in a flange 12 of a cap 13 so that the cap may be securely clutched to the mandrel and to which the cap is clamped or attached by a headed bolt 14 which passes through the web 6 of the mandrel and is secured thereto by a nut 15 screwed into the bolt, a nut 16 being provided at the end of the bolt to lock the cap to the mandrel. The exterior of the mandrel is formed with a notch or recess 17 and the cap with a lug 18 which has an opening 19 adapted to receive the shank of a nipple or L 20 and a notch or recess 21 opposite to the notch or recess 17 of the mandrel so that the head 22 of the nipple or L may find a lodgment in the two notches and be prevented from turning. This nipple receives in its head one end of the pipe to he coiled and secures the pipe to the mandrel while the latter is rotated to coil the pipe .which is indicated by dotted lines in Fig. 1 of the drawing in its coiled conformation and designated by the numeral 28.

In operation the mandrel is attached to the power-head in the manner before mentioned. One end of the pipe to be coiled is fitted in the head of the nipple 20; the shank of the nipple is fitted in the opening 19 of the lug 18 of the cap 13; the cap is clutched to the mandrel by insertion of its flange 12 into the recessed end of the mandrel so that the lugs 10 of the mandrel will fit in the slots 11 of the flange, and the head of the nipple will fit in the registering notches of the mandrel and the cap, and the nut 16 is then screwed up so as to clamp the cap and attached pipe to the mandrel. The mandrel is then rotated and carries with it the pipe so that the latter is coiled around the mandrel and given the configuration of the outer contour of the mandrel so that it has the shape of the interior of the fire pot in which it is to be later positioned and connected up with the water circulating system for heating purposes. When the pipe has been coiled the cap is detached and the coiled pipe removed from the mandrel, and another section of pipe attached to be coiled into shape.

The device is simple and strong and its parts readi y assembled and separated for operation, and pipe can be coiled into shape for a heater in an expeditious and efiieient manner, all of which advantages will heappreciated by the skilled in the art.

' I have described with particularity the preferred details of the several parts but it is obvious that changesmay be made in details of the several features and essentials of the invention be retained. lVhile the mandrel is preferably of the shape illustrated yet it is obvious that the shape may be altered and still the features described be employed. It is also obvious that a mandrel may be readily disconnected from the power shaft and replaced by another of different size or shape.

Having described the invention and set forth its features, what is claimed is:

1. A pipe bending device comprising a rotatable mandrel, a detachable cap formed with an opening for a pipe-holding nipple and shaped to prevent turning of the nipple, and means for locking the cap to the mandrel.

2. A. pipe bending device comprising a retatable mandrel formed with an internal apertured web to receive pins for attaching the mandrel to a rotatable head, a removable cap provided with means for attaching a pipeh0lding nipple, and. means passing through the cap and web of the mandrel to V attach the cap to the mandrel.

3. A pipe bending device comprising a mandrel formed wlth an internal shoulder to form a. seat for a power driven head and with an apertured web to receive pins for attaching the mandrel to the power driven head, and a cap provided with means for connecting the end of a pipe with the mandrel.

4. A pipe bending device comprising a rotatable mandrel having a recessed end, a removable cap provided with means for connecting the end of a pipe with the mandrel,

the cap and recessed end of the mandrel having cooperating clutch members to prevent the cap turning on the mandrel, and means for locking the cap to the mandrel.

5. A pipe bending device comprising a rotatable mandrel having a recessed endv recesses to receive and secure a pipe holding nipple, and means for locking the cap to the mandrel.

In testimony whereof I aflix my signature in presence of two witnesses.

ROBERT BURGE. \Vitnesses JAs. B. MCNELLEY, SAUNDERS JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

